| abstract |
Silsesquioxane polymers that are useful for preparing SiO 2 -rich ceramic coatings are obtained as the polymeric reaction products from the hydrolysis and condensation of organosilanes having a β-substituted alkyl group. A preferred silsesquioxane polymer is the polymeric reaction product obtained from β-chloroethyltrichlorosilane. Coating compositions containing such silsesquioxane polymers dissolved in organic solvent may be applied to a substrate and converted to SiO 2 -rich ceramic thin layers by evaporating the solvent and heating the coated substrate at moderate temperatures. |